存储过程(Stored Procedure)是在大型数据库系统中,一组为了完成特定功能的SQL 语句集,存储在数据库中,经过第一次编译后再次调用不需要再次编译,用户通过指定存储过程的名字并给出参数(如果该存储过程带有参数)来执行它。 存储过程的优缺点: 优点: ①重复使用。存储过程可以重复使用,从而可以减少数据库开发人员的工作量...
GitHub上知名的`awesome-stored-procedure`项目收集了大量优质存储过程示例,本文将从实际应用角度分析其中典型示例的实现原理和最佳实践。 ## 一、项目概览与示例分类 ###1.1awesome-stored-procedure项目简介-GitHub开源项目,专注收集高质量的MySQL存储过程-包含基础CRUD操作、事务控制、性能优化等各类示例-目前收录50+经过...
stored procedurePosted by: John lala Date: December 14, 2007 04:12AM Hello, I want to build up my sql statement in my stored procedure for example: first I want to retrieve the plant ids with a query and in the next query I want to update all the records that 1 of these ...
Example: Local variables Local variables are declared within stored procedures and are only valid within the BEGIN…END block where they are declared. Local variables can have any SQL data type. The following example shows the use of local variables in a stored procedure. ...
Example 16.2 Backup and restore scenario The stored functionsGTID_IS_EQUAL(),GTID_IS_DISJOINT(), andGTID_IS_DISJOINT_UNION()can be used to verify backup and restore operations involving multiple databases and servers. In this example scenario,server1contains databasedb1, andserver2contains databas...
建立存储过程IN_example: delimiter // drop procedure if exists IN_example// create procedure IN_example (IN input_number int) begin set input_number = 2; select input_number; end// 把用户变量@input_number的初始值设为3: set @input_number = 3// ...
The following code shows the complete stored procedure example. usingSystem;usingSystem.Data;usingMySql.Data;usingMySql.Data.MySqlClient;publicclassTutorial6{publicstaticvoidMain(){stringconnStr="server=localhost;user=root;database=world;port=3306;password=***";MySqlConnection conn=newMySqlConnection...
Stored procedures ensure consistent and secure updates to the database. Real-World Application: For example, in a payroll system, you might use a stored procedure to adjust salaries. For more Practice: Solve these Related Problems: Write a MySQL query to create a stored procedure that updates ...
Example of an INOUT parameter Suppose we want to get the total count of movies based on the rating. The input parameter is param_rating in the procedure,and the data type isvarchar(10). The output parameter isMovies_count,and the data type is aninteger. ...
often using storage process technology. MySQL 5.0 does not support the previous version of the stored procedures, with the maturing technology, MySQL, stored procedures, the project would later be widely used. This example will introduce in later versions of MySQL 5.0 to create a stored procedure...